Windmill



E. W. CARVER Sept. 1, '1925.

WI NDMI LL Filed' Nov. 6, 1924 '31a/vento@ GMM Patented Sept. 1, 1925. f i' l UNITED STATES f i k1,551,641

.PATENT oEElcE.

EBENEZER W. CARVER, OF TACOMA, WASHINGTON.

WINDMILL.

Application fusa November e, 19:24.` serial No. 743.175.

To all @07mm if may concern.'

Be it known that I, EBENEZER. 7. CAnvER, i

`it Consists in the novel features hereinafter described and claimed.

Anobject of the invention is to provide a wind mill structure with means for automatically regulating the speed atlwhich the mill will operate under variable wind conditionsand in order that the mill may be used to ladvantage for charging electric batteries or for performing other work requiring regular and uniform speed.

With the above objectin view the wind mill structure includes'ra tower having a vertically di'sposedhollow shaft journaled thereon and with a governor mechanism operatively connected with the shaft. An arm is rotatably mounted upon the upper end of the lower and carries atone end a vane. A wheel shaft is journaled upon the arm and operatively connected with the first nientioned shaft. The said wheel shaft is hollow and a series of blades is pivotallyv mounted upon the said wheel shaft. A rod is movably mounted in the wheel shaft and carries at one end a disc which is operatively connectedwith the blade by means of bars whereby the said blades are turned as the said disc and rod are moved with relation to the wheel shaft. A lever mechanism is mounted at the lower portion of the tower and is operatively connected by` means `of a rod extending through the first mentioned shaft and connected with the rod in the wheel shaft. Said lever mechanism is operatively connected with the governor mechanism. The parts and featuresk are so assembled and connected with each other that as the force of the wind increases, the bladesV are turned so that their edges are presented mill.' n y Figure 2 is a fragmentary side elevation of the wheel of the mill.

Figure 3 is a detail sectional view through the wheel of the mill.

Figure l is a` sectional view through one of the blades of the wheel.

The windmill structure comprises a tower 1 having a hollow shaft 2 journaled'therein.

The shaft 2 is vertically disposed. An arnr 3 is mounted for turning movement at the upper end of the tower and carries at one endA a vane 4E. A hollowT wheel shaft. 5` is journaled for rotation upon the arm 3 and is provided at its inner end with a beveled pinion 6 which meshes with a similar pinion 7 mounted at the upper end of the shaft 2. A hub 8 isk tiXedto the shaft 5 and radially disposed blades 9 are "pivotally mounted upon the hub 8. A rod`10 extends through the shaft 5 and is provided at one end with a disc 11. The disc 11 is'connected with the blades 9 by means of rod sections 12, the said rod sections being pivotally connected with the said blades at one side of their axes and whereby the said blades 9 may be turned upon the hub 8 asthe disc 11 is moved toward or away from the end of the shaft 5. A bell crank lever 13 isr pivoted upon the arm 3 and one end thereof is connected with the rod 10. A rod 14 extends tlnough the shaft 2 and is connected at its upper end with the bell crank lever 13 and at its lower end with a lever 15 which in turn is mounted upon a link 16 supported by a lever 17. The fulcrum ypoint of the lever l5 is slidably mounted in a guide 1S and may move vertically as thelever 17 is swung. A governory mechanism'19 is supported at the intermediate portion of the tower and is operatively connected by means of a shaft 2O with the shaft 2. A rod 21 is connected with .the governor mechanism 19 and with one end of the lever 15. The 'lower end of the rod 21 is connected with a dash pot 22 which is submerged in oil contained in a tank'QB. A-

Weight 24E hangs pendant from the lever 15 and is disposed adjacent the tank 23. A piston 25 is connected with the lower end of the rod 21 and is slidably mounted in thi Figure 1 is a side elevation of the wind dash pot 22. The dash pot 22 is provided with Valves 26 which are located one at each side of the piston 25. Also with check valves at each end of cylinder 22.

It will be seen that when the Iblades are exposed to the wind, the action of the wind upon the vane 4 will turn the arm 3 so that the wind will strike the surfaces of lthe blades which are disposed toward the disc 11. As the velocity of the wind changes or varies, the blades 9 turn upon theirpivotal connections with the hub S'and the bars 12 are moved longitudinally whereby the disc 11 and the rod 10 are moved with relation to the shaft 5. The movement of the rod 10 xblades will rotate about the shaft 5 at a desired rate of speed.

v'The dash pot structure is provided to resist any sudden action of the governor` for without such provision each puff of wind would throw the blades in and -out lof the wind. The check valves are provided to retard the circulation of `the oil through the dash pot and-consequently the action of the dash pot is retarded.

Having thus described the invention, what is claimed is 1. In a windmill, a supporting structure, a wind actuated member rotatably mounted in thesupporting structure and including movable blades, a mechanism Jfor changing the pitch ot' said blades, a governor operatively `connected with the wind actuated member,

a lever connected with said mechanism for operation thereof, a dash pot structure, a tank within which the dash pot is located, said tank adapted to 'be filled with oil in which the dash pot is submerged, check valves at`the ends of the daslipot, apiston in the dash pot, a rod connected tothe piston, to the lever, andvto the governor.

2. In a windmill, a supporting structure, a wind actuated member rotatably .mounted in the supporting structure and including movable blades, a mechanism lfor changing the pitch of said blades, a governor operatively connected with the wind actuated member, a lever connected with said mechanism for operation thereof, a .dash pot structure, a tank within which lthe dash pot is located, said tank adaptedto be filled with oil in which the dash pot is submerged, check valves at the ends of the dash 1pot, a piston in the dash pot, a rod connected tothe piston, to the lever, and to the governor, and a weight suspended fromthe lever adjacent the connection thereofl with the ro'd.

In testimony whereof I afhx my signature.

EBENEZER W. CARVER. 

